I just ran into this issue (again). I did some searching and found that LinuxCNC defaults to G64 with no P value specified as of a certain version (2.7?). That caused some issues for me over the years, so I’d been manually specifying either G61 (exact path mode) or specifying G64 P0.001 (or another value). Then recently I’d forgotten to add it and I noticed some drilling cycles were coming dangerously close to breaking the drill off in the part with an X move. I came across this:
https://forum.linuxcnc.org/fusion-360/36097-fusion-360-milling-post-with-g64-pn <https://forum.linuxcnc.org/fusion-360/36097-fusion-360-milling-post-with-g64-pn> I used his post and it seems to generate the necessary values. I edited the post to default to P0.001. Matt > On Jul 31, 2020, at 9:05 AM, Thaddeus Waldner <thadw...@gmail.com> wrote: > > I’m using Fusion 360 in a workflow for engraving signs. This starts out as a > .dxf file, which I import into a fusion 360 sketch, and then use the trace > feature to generate tool paths. > > As an aside, if anyone has an idea for a simpler workflow (free, of course) > and one that perhaps doesn’t involve Windows, Please suggest it here. I’ve > tried DXF2GCODE and although it looks like it does all that I need, but I > couldn’t get it to work reliably, as it kept skipping features. > > The post processes for EMC—as it’s called in Fusion 360—somehow calls for > path blending and I cannot figure out where. Is path blending turned on by > default, unless you specify exact mode? > > Here’s the preamble as generated by the post: > > % > (ONOFFSWITCHESENGRAVE) > (T1 D=0.25 CR=0. TAPER=30DEG - ZMIN=0. - CHAMFER MILL) > N10 G90 G94 G17 G91.1 > N15 G20 > N20 G53 G0 Z0. > (TRACE2) > N25 T1 M6 > N30 S3820 M3 > N35 G54 > N40 M8 > N45 G0 X11.9375 Y0.9635 > N50 G43 Z0.54 H1 > N55 G0 Z0. > > I was able to fix this by adding the following line: > N36 G64 P0.001 > But I’d like to know how/why it as blending paths in the first place. > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
